From: Kim Phillips <kim.phillips@arm.com>
To: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: peterz@infradead.org, acme@kernel.org, mingo@redhat.com,
tglx@linutronix.de, alexander.shishkin@linux.intel.com,
schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
will.deacon@arm.com, mark.rutland@arm.com, jolsa@redhat.com,
namhyung@kernel.org, adrian.hunter@intel.com, ast@kernel.org,
gregkh@linuxfoundation.org, hpa@zytor.com,
suzuki.poulosi@arm.com, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 0/7] perf: Add ioctl for PMU driver configuration
Date: Mon, 13 Aug 2018 12:46:42 -0500 [thread overview]
Message-ID: <20180813124642.3d49c082a95fc294d926016e@arm.com> (raw)
In-Reply-To: <1531950487-24554-1-git-send-email-mathieu.poirier@linaro.org>
On Wed, 18 Jul 2018 15:48:00 -0600
Mathieu Poirier <mathieu.poirier@linaro.org> wrote:
> This set adds the capability to communiate event specific configuration
> to the PMU kernel driver using an ioctl(). The functionatlity is made
> generic enough for anyone to use but is targeted at the identification
> of CoreSight sinks when operating in CPU-wide trace scenarios.
>
> ---
> Changes for V3:
> . Return an error for CPU-wide scenarios while the feature is being
> implemented (Kim)
Hi, I'm giving this series a short test-drive on Juno.
It yields success for the --per-thread case..:
$ sudo taskset -c 0 ./perf record -e cs_etm/@20010000.etf/ --per-thread uname -a
Linux juno 4.18.0-rc8-00011-gb82af52c4b35-dirty #147 SMP PREEMPT Thu Aug 9 11:20:37 CDT 2018 aarch64 GNU/Linux
[ perf record: Woken up 0 times to write data ]
Warning:
AUX data lost 1 times out of 2!
[ perf record: Captured and wrote 0.067 MB perf.data ]
$
..but not for CPU-wide?:
$ sudo taskset -c 0 ./perf record -e cs_etm/@20010000.etf/ uname -a
failed to mmap with 12 (Cannot allocate memory)
$ sudo taskset -c 0 ./perf record -e cs_etm/@20010000.etf/ -C 0 uname -a
failed to mmap with 12 (Cannot allocate memory)
$
Thanks,
Kim
next prev parent reply other threads:[~2018-08-13 17:46 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-18 21:48 [PATCH v3 0/7] perf: Add ioctl for PMU driver configuration Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 1/7] perf: Introduce ioctl to communicate driver configuration to kernel Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 2/7] perf/core: Use " Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 3/7] perf/aux: Make perf_event accessible to setup_aux() Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 4/7] coresight: Use PMU driver configuration for sink selection Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 5/7] perf tools: Use ioctl to communicate driver configuration to kernel Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 6/7] perf tools: Make perf_evsel accessible to PMU driver configuration code Mathieu Poirier
2018-07-18 21:48 ` [PATCH v3 7/7] perf tools: Use ioctl function to send sink configuration to kernel Mathieu Poirier
2018-08-13 17:46 ` Kim Phillips [this message]
2018-08-14 16:15 ` [PATCH v3 0/7] perf: Add ioctl for PMU driver configuration Mathieu Poirier
2018-08-14 17:09 ` Kim Phillips
2018-08-14 19:42 ` Mathieu Poirier
2018-08-15 9:39 ` Will Deacon
2018-08-15 15:28 ` Kim Phillips
2018-08-16 19:28 ` Mathieu Poirier
2018-08-20 10:03 ` Suzuki K Poulose
2018-08-20 14:22 ` Kim Phillips
2018-08-20 14:36 ` Suzuki K Poulose
2018-08-20 15:25 ` Kim Phillips
2018-08-21 8:39 ` Suzuki K Poulose
2018-08-21 14:47 ` Kim Phillips
2018-08-21 17:16 ` Mathieu Poirier
2018-08-21 19:17 ` Kim Phillips
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